People who wonder about or even actively research the topics of UFOs and visitors from elsewhere sometimes begin with certain assumptions that may only be partially correct.

We might assume that if we are being visited, these intelligent beings are all biological life forms, though they might be quite different from humans.

We could also conclude that they are from another planet and they travel here aboard advanced spacecraft, possibly warping or surfing space-time in some way.

However, there are also theories and indications that, although those basic concepts might generally be accurate in some cases, there could be other developments going on as well.

For example, it might be possible that there are several kinds of intelligent visitors on Earth. Some researchers also suggest that certain unconventional beings might not be visitors at all, but somehow native to our planet, though they reside in hidden dimensions or operate in mysterious ways.

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